[1] Toho Univ, Dept Surg, Ohashi Med Ctr, Tokyo, Japan
[2] Oita Univ, Dept Gastroenterol & Pediat Surg, Fac Med, Oita, Japan
[3] Kurume Univ, Biostat Ctr, Fukuoka, Japan
[4] Yokohama City Univ, Dept Gastroenterol Surg, Grad Sch Med, Yokohama, Kanagawa, Japan
[5] Kumamoto Univ, Dept Pediat Surg & Transplantat, Grad Sch Med Sci, Kumamoto, Japan
[6] Yotsuya Med Cube, Minimally Invas Surg Ctr, Tokyo, Japan
[7] Fujinomiya City Gen Hosp, Dept Surg, Shizuoka, Japan
[8] Univ Tsukuba, Fac Med, Dept Gastrointestinal & Hepatobiliary Pancreat Su, Ibaraki, Japan
[9] Univ Occupat & Environm Hlth, Sch Med, Dept Surg 1, Fukuoka, Japan
[10] Kawasaki Med Sch, Dept Digest Surg, Okayama, Japan
[11] Kitasato Univ, Dept Gen Pediat & Hepatobiliary Pancreat Surg, Sch Med, Sagamihara, Kanagawa, Japan
[12] Toranomon Gen Hosp, Dept Gastroenterol Surg, Hepatobiliary Pancreat Surg Div, Tokyo, Japan
[13] Int Univ Hlth & Welf, Dept Hemodialysis & Surg, Ichikawa Hosp, Chiba, Japan
[14] Tokyo Womens Med Univ, Inst Gastroenterol, Dept Surg, Tokyo, Japan
[15] Teikyo Univ, Dept Surg, Sch Med, Tokyo, Japan
[16] Keio Univ, Dept Surg, Sch Med, Tokyo, Japan
[17] Tokyo Med Univ, Dept Gastrointestinal & Pediat Surg, Tokyo, Japan
[18] Tsudanuma Cent Gen Hosp, Dept Surg, Chiba, Japan
[19] Tajimi City Hosp, Dept Surg, Gifu, Japan
[20] Japanese Red Cross Nagoya Daini Hosp, Dept Surg, Nagoya, Aichi, Japan
[21] Tohoku Rosai Hosp, Dept Surg, Sendai, Miyagi, Japan
[22] Jicji Med Univ, Dept Surg, Div Gastroenterol Gen & Transplant Surg, Shimotsuke, Tochigi, Japan
[23] Nakagami Hosp, Dept Surg, Noborikawa, Okinawa, Japan
[24] Fujita Hlth Univ, Dept Gastroenterol Surg, Bantane Hosp, Toyoake, Aichi, Japan
[25] Kansai Rosai Hosp, Dept Surg, Osaka, Japan
[26] Nippon Med Sch, Dept Gastrointestinal & Hepatobiliary Pancreat Su, Tokyo, Japan
[27] Jichi Med Univ, Saitama Med Ctr, Dept Surg, Saitama, Japan
[28] Jikei Univ, Dept Surg, Sch Med, Tokyo, Japan
[29] Shizuoka Prefectural Gen Hosp, Dept Gastroenterol Surg, Shizuoka, Japan
[30] Shimada Municipal Hosp, Dept Surg, Shizuoka, Japan
[31] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Oncol, Fukuoka, Japan
[32] Sakai City Med Ctr, Dept HepatoBiliary Pancreat Surg, Osaka, Japan
[33] Osaka Police Hosp, Dept Gastroenterol Surg, Osaka, Japan
[34] Juntendo Univ, Dept Hepatobiliary Pancreat Surg, Sch Med, Tokyo, Japan
[35] Ibaraki Seinan Med Ctr Hosp, Dept Gastroenterol Surg, Ibaraki, Japan
[36] Jikei Univ, Dept Surg, Kashiwa Hosp, Chiba, Japan
[37] Obihiro Kosei Hosp, Dept Surg, Obihiro, Hokkaido, Japan
[38] KKR Tachikawa Hosp, Dept Digest Surg, Tokyo, Japan
[39] Saga Ken Med Ctr Koseikan, Dept Gastroenterol Surg, Saga, Japan
[40] Natl Hosp Org Tokyo Med Ctr, Dept Surg, Tokyo, Japan
[41] Tokyo Metropolitan Komagome Hosp, Dept Hepatobiliary Pancreat Surg, Tokyo, Japan
[42] Tohoku Univ, Dept Surg, Sch Med, Sendai, Miyagi, Japan
[43] Nippon Med Sch, Dept Gastroenterol Surg, Chibahokusoh Hosp, Chiba, Japan
[44] Kyoto Prefectural Univ Med, Dept Gastroenterol Surg, Kyoto, Japan
[45] Sainokuni Higashiomiya Med Ctr, Dept Surg, Saitama, Japan